拱点

The angular distance of a point in an orbit past the point of periapsis measured in degrees.

穿过用角度来测量的进拱点的一个轨道里的某点的角距离。

Of or relating an apse .

拱点的或与之相关的。

The extended Poincare map in this paper needs twosurfaces of sections transversal to the flow in phase space,i.e.,relates the crossing of a plane containing one of the collinear libration points back to the periapsis passage.Meanwhile,the map is calculated numerically using the Total-Variation-Diminishing Runge-Kutta integration method to get a good description of the Poincare sections.

文中的推广的Poincare映射需要在相空间中选取两个与流相截的面，即将包含某个天平动点的截面通过轨道来映射到近拱点的通道面上的，在数值上通过总变差减小的Runge-Kutta方法来实现两个相面之间的映射。

Based on the equilibrium equation of an arch element the cubic nonlinear dynamic model with second order is established and the nonlinear differential dynamic system without constant term is obtained through a transfer process of T=U+b. Hence three fixed points and the homoclinic orbits are found. The critical condition of the chaotic vibration of the elastic arch is given by using the method of Melnikov function. The numerical results of the stationary and chaotic motion are given and discussed.

首先利用拱的单元平衡方程建立了拱的二阶三次非线性动力学模型；然后通过变换使方程转化为不含常数项的非线性微分动力系统，并由此得到无扰动系统的3个不动点与同宿轨道；再用Melnikov函数法给出了发生混沌的临界条件；最后给出了该系统出现定常运动和混沌运动的数值结果。

Especially an elongated boss at the junction of the intersecting ribs of the fan vault ing associated with the English Perpendicular style.

尤其是指与英国垂直式风格有关的一种扇形拱顶的交叉拱肋在接合点的拉长浮凸饰。

Especially an elongated boss at the junction of the intersecting rib s of the fan vaulting associated with the English Perpendicular style.

尤其是指与英国垂直式风格有关的一种扇形拱顶的交叉拱肋在接合点的拉长浮凸饰。

Especially an elongated boss at the junction of the intersecting ribs of the fan vaulting associated with the English Perpendicular style.

尤其是指与英国垂直式风格有关的一种扇形拱顶的交叉拱肋在接合点的拉长浮凸饰。

It is embodied concretely:(1) With the adoption of grouting bolts, the cranny in wall rocks can be blocked up, the air can be isolated, the wall rocks can be prevented to be weatherized and make water, the strength of wall rocks can also be avoided to be lowered;(2) The lax broken wall rocks are commentated to a whole by liquid after they were grouted and the rock"s strength is increased, so the wall rocks become a part of the support structure by using itself and become a whole with the original rock, and the roadway is made to keep stable but not easy to be broken;(3) The spray layer wall are filled with liquid after grouting, the stress is avoided to be concentrated because the load could be evenly acted on the spray layer and the support;(4) The pressure acted on the plank can be delivered to the two sidepieces and then to the bottom by reinforcing the sidepiece; At the same time, the concentration degree of loads acted on the motherboard can be weaken because of the enlargement of the combination arch"s thickness, as result, the rock"s stress is lowered and the heaving is alleviated;(5) The common bolt is made to be fixed the whole length after grouting, the layers are connected to a integral whole and bear the weight of loads, so the support structure"s unity is increased.

具体体现在：(1)采用注浆锚杆注浆，可以利用浆液封堵围岩裂隙，隔绝空气，防止围岩风化，且能防止淋水和渗水，避免围岩被水浸湿而降低围岩的本身强度及造成的巷道变形。(2)注浆后浆液将松散破碎的围岩胶结成整体，提高了岩体强度，实现利用围岩本身作为支护结构的一部分，且与原岩形成一个整体，使巷道保持稳定而不易产生破坏；(3)注浆后使得喷层壁后充填密实，保证荷载能均匀地作用在喷层和支护上，避免出现应力集中点而首先破坏；(4)注浆后使作用在顶板上的压力能有效地传递到两帮，通过对帮的加固，又能把荷载传递到底板；同时由于组合拱厚度的加大，这样又能减小作用在底板上的荷载集中度，从而减小底板岩石中的应力，减轻底臌；(5)注浆加固后能使普通端锚锚杆实现全长锚固，它们共同将多层组合拱连成一体，共同承载，提高了支护结构的整体性。

Surrounded by medieval gardens, five monastery-inspired buildings—with stone arches, columns and other elements from actual medieval structures—house a Romanesque chapel, statuary and crucifixes, a 12th-century apse brought from Spain, and hundreds of other rarities.

博物馆四周被一片花园围绕，由五幢富有灵感的修道院大楼组成，每座大楼都采用了石拱门、圆柱形和其它来自于真实的中世纪建筑结构。同时，这些大楼中还拥有罗马式教堂、雕像、十字架、12世纪从西班牙购买的拱点，以及成千上百的稀世珍宝。

A low elliptical or pointed arch; usually drawn from four centers.

一种很低的椭圆拱或尖顶拱；通常有四个中心点。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。